Which condition is defined as inflammation of the peritoneum?

• A. Pancreatitis
• B. Peritonitis
• C. Gastroenteritis
• D. Ulcers

Answer: (B)

Inflammation of the peritoneum is peritonitis. The peritoneum is a thin membrane lining the abdominal cavity and covering abdominal organs, and when it becomes inflamed, it triggers a serious abdominal response. Patients commonly have severe, widespread abdominal pain that may be difficult to pinpoint, with the abdomen often appearing rigid or “board-like” as the muscles tighten to protect underlying tissues. Rebound tenderness, fever, rapid heart rate, and signs of possible shock can follow, especially if the condition is severe or ongoing.

This is the best answer because it specifically names inflammation of the peritoneum. The other options involve different parts of the body: pancreatitis is inflammation of the pancreas and tends to cause upper abdominal pain that can radiate to the back; gastroenteritis is inflammation of the stomach and intestines, typically with vomiting and diarrhea; ulcers are lesions in the stomach or duodenum lining. Each of those conditions has distinct locations and symptom patterns, whereas peritonitis directly refers to the inflammation of the peritoneum itself.